Roller-mill.



W. A. DUNN.

ROLLER MILL.

A PPLIOATION FILED APB.19, 1910.

Patented Sept. 12, 1911.

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ROLLER MILL. APPLICATION FILED APR.19 .1910.

Patentii sefit. 12,1911

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ROLLER MILL.

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W. A. DUNN.

ROLLER MILL APPLIOA TIQH FILED APR. 19, 1.910. 1 ,OO2,906.

Patented Sept. 12, 1911.

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UNITED STATES PATENT OFFICE.

WILLIAM A. DUNN, OF SMITHVILLE, MINNESOTA, ASSIGNO'R OF ONE-HALF T0 ATHOL MORTON MILLER, 0F DULUTH, MINNESOTA.

ROLLER-MILL.

Specification of Letters Patent. Patented 1251911,

I Application filed April 19, 1910. Serial No. 556,379.

To (171 whom it may concern:

Be it known that I, VILLTAM A. DUNN, a citizen of the United States, residing at Smithville, in the county of St. Louis and State of Minnesota, have invented certain new and useful Improvements in Roller- Mills, of which the following is a specification.

This invention relates to improvements in mills, designed primarily for shaping structural beam blanks of various types.

The invention relates to improvements in the structure disclosed in a patent to me Sept. 16, 1902, No. 709081.

According to my present invention, I provide specially designed rolls to engage the upper and lower surfaces of the ingots to etiegftive-ly resist the tendency of the metal to buckle at the time side pressure of two vertical rolls is exerted, on each edge of the blank.

A further object of the present invention is to provide means for. raising and lowering the-upper pressure roll adjacent the vertical rolls, as the metal is reduced in thickness by the several passes made through the mill. As the upper pressure 'roll is Subjected to great upward strain when the metal passes under it, it becomes vitally important to provide a .substantial means to resist this strain, and yet be able to effect the raising and lowering with as little friction as possible. I have therefore provided a carriage of improved construction to accommodate the pressure roll, and also improved mechanism for raising and lowering the same.

A further object of the invention is to provide specially constructed mechanism for operating the vertical rolls which determine According to my present improvements in this particular, I arrange the adjiisting screws, one above the other, and in direct alinement with the center of the axis of the vertical rolls, thereby making it possible for the screws to receive the out-ward thrust exerted by the passing 4 ingot directly in line with the center of the vertical rolls and making possible the use of ingots of greater depth'than in niills now in use.

My invention also relates to improvements in the formation of the shaping rolls, whereby the mill may be adapted, by the substitution of various combination of rolls, to make beam blanks of various Shapes, without said rolls.

structure wherein a pressure ro'll engages the inside of the flange of the-ingot on which the vertical side rolls are working and which thereby prevents any displacement of the metal as the same is forced inwardly by the A further advantage of the roll engaging the inner side of the flange is the resulting effect of reducing the thickness of such flange to a degree not possible where such roll is not employed;

The invention also comprchends improvements in the specific details of construction and arrangement of parts to be hereinafter described, the claims.

In the drawings :--Figure 1 is a plan view of my improved'mill. Fig. 2 is a view of the vertical rolls and their mountings, one of the latter shown in section to better illustrate the details of construction. Fig. 3' is a longitudinal sectional view on the line azm Fig. 2. -Fig.. 4 is an inside View of one of the vertical rolls and its mounting.

and particularly pointed out in Fig. 5 is a side elevation of the frame in which the vertical rolls' are mounted and the gears by means of which the said rolls are adjusted. Fig.- 6 is-a view of a pair of horizontal shaping rolls, with an ingot making its first pass therebetween preparatorv to,

forming a channel beam blank. Fig. 7, is a view similar to Fig. 6, but illustrating the last pass of they ingot, the latter having been shaped to form a channel beam blank. The, same numerals refer to like parts in all the figures.

which carrythe vertical rolls 33, and the horizontal supporting and pressure rolls 4 and 5. Each frame 2, is provided with a cut away portion 6 to form a guide way for a sl ding bearing block 7, having ribs to engage corresponding grooves in the walls of the guide Way. The inner face of each of the sliding bearing blocks is formed with a recess, and the upper and lower walls of the recess are formed with openings to receive the journals of one of the vertical rolls 3. The periphery of each roll 3 is smooth throughout its length, asclearly shown in Fig. 2. In the outer vertical wall of each frame 2, are two horizontal openings 9-9, one located above.-=-.and\in4llQ 1 indicates supports for the frames 22,

' axially in the plane of the and both being axisof the vertical rolls. In each of said openingsis inserted an interiorly threaded bushing 10,

alinenient with the other,

of suitable metal. The bushing is also threaded on its outer end and receives a ;collar1'1. Y

block are tWO'SCIBWS 12, one

Extending from each sliding bearing hand thread and the othe'ra left hand thread and which v engage the correspondingly threaded bushings, and each has square extension protruding through the collar 11.

The inner end of each screw is formed with a flange 13' which fits in a recess in the sliding bearin block, and is adapted to turn freely in the atter.

A retaining plate 14,

, fits over each screw, and against the flange 13 thereof, and is bolted to the faceof the sliding block to retain the flange in its recess." This construction is designed to; form.

a substantial swivel connection between the screws and thesliding blocks; 1 The retaining plates 14, while serving to form a part of the swivel connection, also form bearing surfaces against which the flanged ends of the screw bearwh'en thesliding blocks are drawn out. I 7 i The hubs 15, of gears 16, fitov'er the outer 'flanged endof" each collar 11,v and to the inner -;face of each hub is bolted an'annular flange17, which engage'behind the flange 7 on the end of thesaid-collar, thereby holding I the gear in position, ,for it to freely revolve.

Each gear 16, is'formed with a squareopening 20, throughwhich passes the square extension of oneofthe screws12. l. The gears rolls 3- 3 are bevel gears 24-Q24 which'me'sli of the flanges of the beam blanks being sup'- portedli The journal 30 is supported in a' bearing 32; formed in'a base 33, 'securedto the supports Is-1. 'The pressure roll 5, is-

with beveled gears 25-25,- on a transversely arranged line shaft 26, mounted in bearings 27,jon the frames 2 2. "The gears 25.,are: spl'iiied tothe line shaft, and. are adapted to have a'sl'idingmovement thereon, :a bearing 28, b eing provided for so mounting each gear, the said: bearingsbeingisecured toth sliding bearing. blocks. f 1 i The supporting Iroll 4,is formed at its center'wit-h a reduced portion to provide journal 30,"a nd'its flanged edges 31 are beveled to fit s'nuglythe tape 7 9 of the walls construct-ed exactly -the-same as the support- 36,"secured to end cross bars 37.

38, in 'the'frames 22. v37, projecting inthcslots and are formed having a right 22, extendingb'eam blank, it will be seen that when the ing roll 4 and it is adjustable toward and from the metal being operated upon. The central journal 34 or the pressure roll 5, is mounted in abcaring 35, formed in a. yoke The ends of thelatter fit in vertically disposcd slots The ends of'thc bars with threaded openings 39, through which pass vertical screws 40, mounted to turn in' I sultable bearings-41. On the lower-ends of the screws 40, are beveled gears 42, which mesh wlth beveled gears 48, on shafts 22*. Thegear ng is so timed that as the ingots are reduced in thickness by being shaped by V ,thehorizontal shaping rolls, to be described .the pressure roll will be lowered to contact with the top of ,theweb of the beam blank asitpasses .overthe supporting roll. at. By this construction of rolls, 1 anrcnablcd to operate successfully on much wider ingots.

hence produce larger beam blanks, than heretofore. This is due to the factthat the ends of the rolls form substantiallybearing surfaces on the inner surfaces of the flanges of the beam blanks, when the metal is forced inwardly by the'action of the vertical rolls. Furthermore the metal is for all practical purposes clamped between the rolls at the qtn'ne the vertical rolls are acting on it, which effectually prex ents themetal buckling.

The horizontal shaping rolls differ in con figuration. according to the beam blank desired tof'be made. Forshaping; ordinary channel beam blanks the upper horizontal roll- 4:7 will have a centralcylindrical portion 45 (see Figs6 and.7). there being. an

inclined annular surface 46,, from each end of thesaidcentral cylindrical portion; The lower horizontal roll 48 is formed with flanged ends ,458, and a central cylindrical po'rtio'n49 over which the ingot a fits. The

edges50, of the cylindrical portion 49, are

beveled'toreduced necks 5'1. The ends of the at"5 8, to, and,-

roll fI'0Ii1it-l'l necksincline up merge into the. end flanges 48.

In the operation of the mill, ,the' ingotjs.

passed back and forth between the vertical andh orizo'nt al rolls until it has been reduced 'in thickness and shape to the desired outline, this depending altogether upon the character of beam blanks being rolled and the shape of the rolls obtain the result.

Referring particularly to the illustraplacd in the mill 'tions disclosed in Figs. 6 and 7 where rolls:

are arranged for the formation of a channel ingot makes the first pass between the horizontal rolls 47 and 48 the'metal is crowded down in the cavities formedby the necks 51, and by the downward pressure of the upper roll operated thmiigh the instrumentality-of the gearing 70, which is substantially the'same as that'disclo'sed in thepats ent previously mentioned. The ingot passing from between the two horizontally disposed rolls 47 and 48 is fed between the vertically disposed rolls 3, which at the first pass of the ingot, are so spaced: that they will engage the sides of the ingot, and tend to further crowd in the metal. The ingot is supported on the roll 4 and is pressed down in contact therewith, by the upper roll 5. Were it not for the upper pressure roll 5, the inward pressure caused by the two vertical rolls 33 would tend to buckle the metal, and thereby destroy the proportions, as well as the outline of the proposed beam blank. The next pass of the metal between the horizontal rolls,'reduce's the thickness' of the ingot, due to the beveled surfaces 46, and 58 The metal is crowded inwardly toward the center of the ingot, and against the ends of the center portion 48, of the 'lower roll, as described in the previously mentioned patent. The upper horizon al roll 47, is lowered by any suitable power be ing applied to the line shaft, the same power also setting into motion the line shaft 22 which, through the medium of the gears 42, and 43, simultaneously lowers the hori-' zontal pressure roll 5,v a distance proportionate with the distance traveled by'the roll 47, and at the same time through the instrumentality of the gears 16, and screws 19., the two vertically disposed rolls 3, are advanced toward each other a distance commens'urate with the size of the ingot after the latter has been subjected to a pass between the two horizontal shaping rolls-.- This operation :is continued until the ingot has been reduced to the desired thickness for the proposed'beam blank and the side ribs or flanges of said beam blank have been reduced to the desired thickness. It is when the ingot has been so reduced in thickness as to be more susceptible to a buckling action, due to the side pressure of the vertically disposed rolls 3 that the pressure roll 5, and the supporting roll 4, come mostly into play. This is due to the fact, the web or body of the beam blank is so reduced in thickness it is more liable to buckle by the edge pressure exerted in opposite directions by the oppositely disposed rolls, particularly is thistrue with beamsof unusual width. Inasmuch as the roll 4 receives the edgethrust of the side flange of the channel beam blank when the latter is acted ,on by the rolls 3 it is not necessary to have the pressure roll to engage the entire ilpper surface of the web, as the fiange of the supporting roll prevents the nward pressure. of said vertical rolls reaching the center of the web, hence I have devised the pressure roll so as to bear directly on the web of the beam-blank at the points, where the buckling action usually takes-place, as

clearly shown in Fig. 2. The metal is passed back and forth through the mill as many times as may be found necessary to reduce theingot to the desired shape as has been previously stated. The outward pressure exerted on the sliding blocks, by the ingot when passing between the vertical rolls, distributes the strain throughout the entire length of the said rolls, and thence to the screws, thereby materiallypreventing breaking of the elements.

By constructing a mill such as described I am enabled to handle ingots of unusual size for the production of beam blanks or plates of unusual width, and length, as the parts are so constructed and arranged as to effectively prevent the metal from buckling and the pressure is so distributed as to enable me to produce with accuracy a beam blank of determined width and thickness.

The act-ion and movement of the vertical and horizontal rolls are controlled by the clutch in precisely the same manner, and for the same purpose described in the patent therein mentioned.

What I claim is:

1. In a mill of the class described, the combination of two horizontal shaping rolls, operating means for decreasing the distance between the said rolls, two vertical side gaging rolls, operating means for moving the two vertical side gaging rolls toward each other, a horizontal supporting roll adjacent I. the vertical side gaging rolls, a horizontal guide roll located over the horizontalsupporting roll, and adapted to be moved toward 'the latter and cooperating there with to prevent buckling of the metal being operated upon by the vertical side gaging rolls, bearings intermediate the ends of said horizontal supporting and guide rolls in Which the latter are mounted, and a train of gearing for operating the several operating means for decreasing the distance between theshaping rolls, decreasing the distance between the vertical side gaging rolls, and moving the pressure roll toward the supporting roll.

2. In a mill of the class described, the combination of, two horizontal shaping rolls, operating means for decreasing the distance between said rolls, two vertical side gaging rolls, operating means for moving the two vertical side gaging rolls toward each other, a supporting roll adjacent the vertical side gaging rolls, a pressure roll 10- cated over the supporting roll, a yoke having a bearing for the center of the pressure 4 roll, end bars supporting the yoke, screws .engaging the bars to move the pressure roll toward the supporting-roll, and. a train of gears for operating the screws, adjusting the vertical side gagin rolls, and adjusting the unner horizontal r0 1.

3. In a mill of the class described, 'the combination with a pair of horizontal shaping rolls, of means for operating the same,

two'vertical side gaging'rolls,"two sliding bearings for said vertical side gaging rolls,

"the [vertical roll [and swiveled to blocks; 'framesdn which" the hearus; and having threaded openings-"for thb 'fscrews, flanged collars 'eXtending from'the frames and through which the screws""pass, a gear 'wheel mounted on the jfiange of each collar andformed withtan hpening "through which the end of a* screwpas'se'sfa' flange on each gear side gaging rolls, a" pressure-roll having a rcducedcentral portion, said pressure roll "being locatedabove the supportingroll, a-

- I pressure roll, and

mental rolls.

yoke for supporting the pressure roll, means ibroperating theqyoke, and meansfor-adjusting the vertical sidegaging rolls, the- 4; I113 a 'mil-l (Sfthe class described, the

combination of-a frame, a pair of vertically disposed side gaging rolls, slid ng bearing blocks which the vertical side gaging rolls are mo inted, means for adjusting the verti-' cal side gaging rolls, a supporting roll over whichz'an ingot passes, the end faces of "the supporting roll beingspaced'from the operat-i-vefacesof the vertical side-gaging rolls at allatimes, whereby. lIO-fOTH1 spaces which confine .thexflanges formed on an-ingot, a

jpressureroll above thesupportingroll, a.-

-' yoke forccarrying the pressure roll, means foradjusting the pressure roll, and a pair- ,ofv horizontal shaping rolls which cooperate with the verticalside gaging rolls to shape-l the ingot.

, posed side gaging rolls, means for adjusting the ivertical side gagingrolls, a. supporting rolladjacent theverticalrolls, a pressure rollabove the supporting roll, said pressure ,roll. being reduced at its center, a yoke in whichthe reduced portioniof the pressure -roll s mounted, two supportingbars on- V whichthe yoke is carried, means for raising and lowering thesupporting bars to adjust I the 'pressureroll, and a train of gearing for adjusting the vertical side gaging rolls, the

pressure roll. and one ofthe horizontal rolls. 6. In amiu of the class described, the

vcomhination o f'two horizontal rolls, one of said rolls having a reduced neck and a beveled annular surface extending from the neclr" to form a flange on ail-ingot, the oi-hr crews arpanged one above the other and being in alinement with the axis the upper one of the hori-" said roll bearingon the opposite surface of the ingot, two verticalside gaging rolls cooperating with the horizontal, rolls, an upper pressure 'roll adjacent the vertical 'side' gaging rolls, a lower supporting roll below and inthe plane of the pressure roll, and'means intermediate the ends of the pressure and supporting rolls for mounting the latter.

i '7. In a mill of the class described, the

' combinationof two horizontal shaping rolls, one of said rolls having a continuous cylindr cal portion, and a reduced neck at each end thereofl 'the said cylindrical portion forminga support for the entire surface of a beam between the flanges thereof, and an outwardly beveled annular surface extendingfrom each neck to form flanges on an ingot, the other horizontal shaping roll having a central cylindrical portion slightly wider than the cylindrical portion of the first mentioned horizontal shaping roll, and formed at opposite ends with outwardly beveled portions, the said'beveled port-ions being of greater diameter than the cylindrical portion, the cylindrical portion of said second roll extending the entire distance between the "outwardly beveled portions of said rollto engage one entire surface of the beam, an; upper pressure roll, a lower supporting roll below and in the plane of the pressure roll, a vertical roll at each end of the pressure and supporting rolls, 'and means for adjusting said vertical rolls to ward and from the pressure and supporting rolls,

8. III- it mill oftl e class described, the

combination of .apalr of horizontally disposed rolls, one of said rolls having a cent-ral cylindrical portion and reduced necks adjacent said cylindrical portions and outwa'rdly beveled flanges extending from said necks, the other said roll having. a central cylindrical. portion of greater length than v i v i the central cylindrical portion of thecom- {In a millof the class described, the combination of ,a pair of horizontally disposed shaping rolls, a pair .of vertically-dispanion roll and having outwardly .beveled flanges extending from the cylindrical portion, a supporting roll, a pressure roll, a vertical roll adjacent to and spaced from the ends of the supporting and pressure rolls, and screws located in al nement with vortical gaginglroll spaced from the opposite ends of the pressure and supporting rolls, a carriag'e for supporting each of said vertical i aging rolls, a pair otjscrews located one above the other and extending from each carriage in line with the axis of the roll, gears for simultaneously turning the screws of both carriages to adjust the gaging rolls and gears for operating the vertical gaging rolls.

10. In a mill of the class described, the combination of a pair of shaping rolls, a

horizontal supporting roll and a horizontal pressure roll in alinement with the shaping rolls, each of said pressure and supporting rolls having a central reduced portion, bearings in which the central reduced portions of the said rolls are mounted, means for adjusting one of said bearings, vertically 5 disposed side gaging rolls adjacent to and spaced from the ends of the supporting and pressure rolls, and means for ad usting said vertical gaging rolls.

In testimony whereof I affix my signature 20' in' presence of two witnesses.

WILLIAM A. DUNN.

Witnesses:

F. L. BROWNE, A. L. WEAVER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. I 

